Re: how to alias commands?

[Lukas-Fabian Moser]

Hi Kenneth,

Am 31.12.22 um 11:26 schrieb Kenneth Flak:
> Is there a way to alias a command in lilypond? F.x. I would like to substite 
> `\markup \rN` with simply `\rn`. Defining `rn` as a variable doesn't work, so 
> what are the ways?

Usually it does actually work:

\version "2.24.0"

something = \trill

{
  a'4\something
}

The problem is that \rN (I assume you refer to David Nalesnik's roman 
numeral library) is a markup function, and these are special. If you 
want to have a shorthand for situations where you use \markup \rN ... in 
music (or lyrics), you can do:

rN = #(define-scheme-function (arg) (markup?) (markup #:rN arg))

For example:

\version "2.24.0"

% Some arbitrary definition of rN as a markup command
#(define-markup-command (rN layout props arg) (markup?)
   (interpret-markup layout props
   #{ \markup { \huge \italic #arg } #}))

rN = #(define-scheme-function (arg) (markup?) (markup #:rN arg))

{
  a'-\rN Text
}

\new Lyrics \lyricmode {
  \rN test
}

I'm not 100% sure if there might be some disaster lurking if you (like 
me) take the exact name of the markup function for the shorthand; if you 
want to be on the safe side, just take a different name (like rn, as you 
proposed).

Lukas